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operator: Fix update of labels and annotations of PodTemplates #9860

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merged 3 commits into from
Jul 13, 2023
Merged

operator: Fix update of labels and annotations of PodTemplates #9860

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86e31be
operator: Do not use mergo for updating existing resources
xperimental Jul 4, 2023
eb9dac8
Merge branch 'main' into operator-no-merge-on-update
xperimental Jul 12, 2023
0150a95
Only overwrite certain fields of the PodSpec
xperimental Jul 12, 2023
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65 changes: 28 additions & 37 deletions operator/internal/manifests/mutate.go
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Original file line number Diff line number Diff line change
Expand Up @@ -16,14 +16,24 @@ import (
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
)

// MutateFuncFor returns a mutate function based on the
// existing resource's concrete type. It supports currently
// only the following types or else panics:
// - ConfigMap
// - Service
// - Deployment
// - StatefulSet
// - ServiceMonitor
// MutateFuncFor returns a mutate function based on the existing resource's concrete type.
// It currently supports the following types and will return an error for other types:
//
// - ConfigMap
// - Secret
// - Service
// - ServiceAccount
// - ClusterRole
// - ClusterRoleBinding
// - Role
// - RoleBinding
// - Deployment
// - StatefulSet
// - ServiceMonitor
// - Ingress
// - Route
// - PrometheusRule
// - PodDisruptionBudget
func MutateFuncFor(existing, desired client.Object, depAnnotations map[string]string) controllerutil.MutateFn {
return func() error {
existingAnnotations := existing.GetAnnotations()
Expand Down Expand Up @@ -61,7 +71,7 @@ func MutateFuncFor(existing, desired client.Object, depAnnotations map[string]st
case *corev1.Service:
svc := existing.(*corev1.Service)
wantSvc := desired.(*corev1.Service)
return mutateService(svc, wantSvc)
mutateService(svc, wantSvc)

case *corev1.ServiceAccount:
sa := existing.(*corev1.ServiceAccount)
Expand Down Expand Up @@ -91,12 +101,12 @@ func MutateFuncFor(existing, desired client.Object, depAnnotations map[string]st
case *appsv1.Deployment:
dpl := existing.(*appsv1.Deployment)
wantDpl := desired.(*appsv1.Deployment)
return mutateDeployment(dpl, wantDpl)
mutateDeployment(dpl, wantDpl)

case *appsv1.StatefulSet:
sts := existing.(*appsv1.StatefulSet)
wantSts := desired.(*appsv1.StatefulSet)
return mutateStatefulSet(sts, wantSts)
mutateStatefulSet(sts, wantSts)

case *monitoringv1.ServiceMonitor:
svcMonitor := existing.(*monitoringv1.ServiceMonitor)
Expand Down Expand Up @@ -138,14 +148,6 @@ func mergeWithOverride(dst, src interface{}) error {
return nil
}

func mergeWithOverrideEmpty(dst, src interface{}) error {
err := mergo.Merge(dst, src, mergo.WithOverwriteWithEmptyValue)
if err != nil {
return kverrors.Wrap(err, "unable to mergeWithOverrideEmpty", "dst", dst, "src", src)
}
return nil
}

func mutateConfigMap(existing, desired *corev1.ConfigMap) {
existing.Annotations = desired.Annotations
existing.Labels = desired.Labels
Expand Down Expand Up @@ -217,41 +219,30 @@ func mutatePrometheusRule(existing, desired *monitoringv1.PrometheusRule) {
existing.Spec = desired.Spec
}

func mutateService(existing, desired *corev1.Service) error {
func mutateService(existing, desired *corev1.Service) {
existing.Spec.Ports = desired.Spec.Ports
if err := mergeWithOverride(&existing.Spec.Selector, desired.Spec.Selector); err != nil {
return err
}
return nil
existing.Spec.Selector = desired.Spec.Selector
}

func mutateDeployment(existing, desired *appsv1.Deployment) error {
func mutateDeployment(existing, desired *appsv1.Deployment) {
// Deployment selector is immutable so we set this value only if
// a new object is going to be created
if existing.CreationTimestamp.IsZero() {
existing.Spec.Selector = desired.Spec.Selector
}
existing.Spec.Replicas = desired.Spec.Replicas
if err := mergeWithOverrideEmpty(&existing.Spec.Template, desired.Spec.Template); err != nil {
return err
}
if err := mergeWithOverride(&existing.Spec.Strategy, desired.Spec.Strategy); err != nil {
return err
}
return nil
existing.Spec.Template = desired.Spec.Template
existing.Spec.Strategy = desired.Spec.Strategy
}

func mutateStatefulSet(existing, desired *appsv1.StatefulSet) error {
func mutateStatefulSet(existing, desired *appsv1.StatefulSet) {
// StatefulSet selector is immutable so we set this value only if
// a new object is going to be created
if existing.CreationTimestamp.IsZero() {
existing.Spec.Selector = desired.Spec.Selector
}
existing.Spec.Replicas = desired.Spec.Replicas
if err := mergeWithOverrideEmpty(&existing.Spec.Template, desired.Spec.Template); err != nil {
return err
}
return nil
existing.Spec.Template = desired.Spec.Template
}

func mutatePodDisruptionBudget(existing, desired *policyv1.PodDisruptionBudget) {
Expand Down
4 changes: 2 additions & 2 deletions operator/internal/manifests/mutate_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -488,7 +488,7 @@ func TestGetMutateFunc_MutateRoleBinding(t *testing.T) {
require.Exactly(t, got.Subjects, want.Subjects)
}

func TestGeMutateFunc_MutateDeploymentSpec(t *testing.T) {
func TestMutateFuncFor_MutateDeploymentSpec(t *testing.T) {
type test struct {
name string
got *appsv1.Deployment
Expand Down Expand Up @@ -615,7 +615,7 @@ func TestGeMutateFunc_MutateDeploymentSpec(t *testing.T) {
}
}

func TestGeMutateFunc_MutateStatefulSetSpec(t *testing.T) {
func TestMutateFuncFor_MutateStatefulSetSpec(t *testing.T) {
type test struct {
name string
got *appsv1.StatefulSet
Expand Down